#include <stdio.h>
#include <stdlib.h>	/* exit() */
#include <pthread.h>

/*
 * 获取线程退出状态
 */


void * thr_fn1(void * arg)
{
	printf("thread 1 returning\n");
	return ((void *) 1);
}

void * thr_fn2(void * arg)
{
	printf("thread 2 exiting\n");
	return ((void *) 2);	
}

int main(void)
{
	int err;
	pthread_t tid1, tid2;
	void *tret;

	err = pthread_create(&tid1, NULL, thr_fn1, NULL);
	err = pthread_create(&tid2, NULL, thr_fn2, NULL);

	err = pthread_join(tid1, &tret);		// 阻塞当前的线程，直到另外一个线程运行结束 
	if (err != 0)
		printf("can't join withthread 1 : %s'n", strerror(err));
	printf("thread 1 exit code %d\n", (int)tret);

	err = pthread_join(tid2, &tret);
	if (err != 0)
		printf("can't join with thread 2: %s\n", strerror(err));
	printf("thread 2 exit code %d\n", (int)tret);

	exit(0);
}

/*

thread 2 exiting
thread 1 returning
thread 1 exit code 1
thread 2 exit code 2

 */
